Question

the effective resistance of the combination of two resistance 10 and 15 connected in series is dash
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Answer 1

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12th

Physics

Current Electricity

Equivalent Resistance in Series-Parallel

The effective resistance in...

PHYSICS

The effective resistance in series combination of two equal resistance is

′

s

′

. When they are joined in parallel the total resistance is p. If s=np then the minimum possible value of

′

n

′

is

MEDIUM

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ANSWER

Let the resistors be,

R

1

,R

2

given,

S=R

1

+R

2

P=

R

1

+R

2

R

1

R

2

R

1

+R

2

=

R

1

+R

2

nR

1

R

2

(R

1

+R

2

)

2

=nR

1

R

2

minimum occurs only when R

1

=R

2

Therefore n=4

Answer 2

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